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[variant.assign] Introduce bullets for 'If an exception is thrown...'… #1069

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Nov 18, 2016
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[variant.assign] Introduce bullets for 'If an exception is thrown...'… #1069

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20 changes: 13 additions & 7 deletions source/utilities.tex
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Original file line number Diff line number Diff line change
Expand Up @@ -4016,13 +4016,15 @@
This function shall not participate in overload resolution unless
\tcode{is_copy_constructible_v<$T_i$> \&\& is_move_constructible_v<$T_i$> \&\& is_copy_assignable_v<$T_i$>}
is \tcode{true} for all $i$.
If an exception is thrown during the call to $T_j$'s copy assignment,
\begin{itemize}
\item If an exception is thrown during the call to $T_j$'s copy assignment,
the state of the contained value is as defined by the exception safety
guarantee of $T_j$'s copy assignment; \tcode{index()} will be $j$.
If an exception is thrown during the call to $T_j$'s copy construction
\item If an exception is thrown during the call to $T_j$'s copy construction
(with $j$ being \tcode{rhs.index()}), \tcode{*this} will remain unchanged.
If an exception is thrown during the call to $T_j$'s move construction,
\item If an exception is thrown during the call to $T_j$'s move construction,
the \tcode{variant} will hold no value.
\end{itemize}
\end{itemdescr}

\indexlibrarymember{operator=}{variant}%
Expand Down Expand Up @@ -4059,11 +4061,13 @@
\tcode{true} for all $i$.
The expression inside \tcode{noexcept} is equivalent to:
\tcode{is_nothrow_move_constructible_v<$T_i$> \&\& is_nothrow_move_assignable_v<$T_i$>} for all $i$.
If an exception is thrown during the call to $T_j$'s move construction
\begin{itemize}
\item If an exception is thrown during the call to $T_j$'s move construction
(with $j$ being \tcode{rhs.index())}, the \tcode{variant} will hold no value.
If an exception is thrown during the call to $T_j$'s move assignment,
\item If an exception is thrown during the call to $T_j$'s move assignment,
the state of the contained value is as defined by the exception safety
guarantee of $T_j$'s move assignment; \tcode{index()} will be $j$.
\end{itemize}
\end{itemdescr}

\indexlibrarymember{operator=}{variant}%
Expand Down Expand Up @@ -4118,12 +4122,14 @@
\pnum
The expression inside \tcode{noexcept} is equivalent to:
\tcode{is_nothrow_assignable_v<$T_j$\&, T> \&\& is_nothrow_constructible_v<$T_j$, T>}.
If an exception is thrown during the assignment of \tcode{std::forward<T>(t)}
\begin{itemize}
\item If an exception is thrown during the assignment of \tcode{std::forward<T>(t)}
to the value contained in \tcode{*this}, the state of the contained value and
\tcode{t} are as defined by the exception safety guarantee of the assignment
expression; \tcode{valueless_by_exception()} will be \tcode{false}.
If an exception is thrown during the initialization of the contained value,
\item If an exception is thrown during the initialization of the contained value,
the \tcode{variant} object might not hold a value.
\end{itemize}
\end{itemdescr}

\rSec3[variant.mod]{Modifiers}
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